What about the current of the power supply? I'm worried that it may damage the NodeMCU
– TobotJan 6 at 12:38

What about the current of the power supply? Why do you think that factors into anything?
– Majenko♦Jan 6 at 12:38

1

@Tobot What Majenko is trying to say, in the most condescending way that can be conjured at this time, is that you need to do some reading on the fundamentals of electricity. The GPIO pin determines what current it draws from the power supply, not the other way round. A supply could be rated for 1A or 1000A: if a connected device only needs 1uA, it will only draw 1uA.
– CharlieHansonJan 6 at 13:12